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Minimum aggregation window
Reporting audience or visit counts over too short a time window (e.g. hourly) at fine spatial resolution can approach single-visit identifiability even if the raw count clears a k-anonymity floor for a longer window.
Class
Case to account for
Affects
2 conversions
01
Detection
Reporting time grain shorter than the vendor's/policy's documented minimum aggregation window for the chosen spatial resolution.
02
Mitigation
01
Enforce a joint spatial-resolution x time-window minimum (finer space requires coarser time and vice versa)
02
Reject report requests that request both fine space and fine time simultaneously without additional suppression
03
Affected conversions
PointH3
OPENRasterH3
OPENMore in Privacy
Consent-based precision reductionDeclared unit below the precise-location thresholdDevice trajectory exposureDifferential privacy noise calibrationHousehold-level targeting riskK-anonymity thresholdsRegional privacy restrictionsResolution degradation policySmall-cell re-identification riskSparse-audience suppressionTemporal leakage